We present a four-core Yb-doped fiber that exhibits a mode instability threshold of 536W, which is about four times the threshold of a single core. This fiber design shows a route to circumvent mode instabilities.
© 2013 OSA
(140.3510) Lasers and laser optics : Lasers, fiber
(140.6810) Lasers and laser optics : Thermal effects
(190.2055) Nonlinear optics : Dynamic gratings
(140.3425) Lasers and laser optics : Laser stabilization
H. Otto, A. Klenke, C. Jauregui, J. Limpert, and A. Tünnermann, "Four-fold increase of the mode instability threshold with a multi-core photonic crystal fiber," in Frontiers in Optics 2013 Postdeadline, I. Kang, D. Reitze, N. Alic, and D. Hagan, eds., OSA Postdeadline Paper Digest (online) (Optical Society of America, 2013), paper FW6A.5.
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